ADP2503/ADP2504

Data Sheet

Rev. D | Page 14 of 16

Table 6. Recommended Output Capacitors

Vendor

Value

Device No.

Dimensions

L × W × H (mm)

Murata

2 × 10 μF, 6.3 V

GRM188R60J106ME47

1.6 × 0.8 × 0.8 (2)

TDK

2 × 10 μF, 6.3 V

C1608JB0J106K

1.6 × 0.8 × 0.8 (2)

Murata

22 μF, 6.3 V

GRM21BR60J226ME39

2 × 1.25 × 1.25

TDK

22 μF, 6.3 V

C2012X5R0J226M

2 × 1.25 × 1.25

TDK

22 μF, 10 V

C3216X5R1A226K

2 × 1.25 × 1.25

Murata

2 × 10 μF, 10 V

GRM21BR71A106KE51L

2 × 1.25 × 1.25 (2)

Input Capacitor Selection

The ADP2503/ADP2504 require an input capacitor to filter

noise on the VIN pin, and provide the transient currents while

maintaining constant input and output voltage. A 10 μF X5R/

X7R ceramic capacitor rated for 6.3 V is the minimum recom-

mended input capacitor. Increased input capacitance reduces

the amplitude of the switching frequency ripple on the battery.

Because of the dc bias characteristics of ceramic capacitors, a

0603, 6.3 V, X5R/X7R, 10 μF ceramic capacitor is preferable.

Table 7. Recommended Input Capacitors

Vendor

Value

Device No.

Dimensions

L × W × H

(mm)

Murata

10 μF, 6.3 V

GRM188R60J106ME47

1.6 × 0.8 × 0.8

TDK

10 μF, 6.3 V

C1608JB0J106K

1.6 × 0.8 × 0.8

OUTPUT VOLTAGE PROGRAMMING

The ADP2503/ADP2504 have an adjustable model where the

output is programmed through an external resistor divider.

The resistor divider is connected between VOUT and FB and

between FB and GND; keep the combined total for the resistor

500 mV and depending on the output voltage required, the

following equation can be used to calculate the value of the

resistors:

REF

OUT

V

R

R

R

V























2

2

1

An example of the calculation for a required output voltage of

3.0 V follows.

V

5

.

0

k

60

k

360

V

0

.

3

























SW1

1.5µH

PVIN

2.3V TO 5.5V

2.8V TO 5V

20µF

10µF

ADP2503/ADP2504

VIN

VOUT

SW2

FB

R1

R2

SYNC

EN

OFF

ON

PGND

AGND

Figure 30. Typical Application Circuit for the Adjustable ADP2503/ADP2504